the white light has many colours in it. this is called the spectrum. as the plant is green, it absorbs all the colours except green. green reflects off the plant, into our eyes and we see a green plant.
the same would work with any object that reflects its own colour and no more. white objects reflect all light and black objects reflect no light.
If an object is white in sunlight it will be green in green light. A white object reflects all wavelengths (colors) of light that shine on it. If only green light shines on it, that color will be reflected and the object will look green.
While the ball would still be green it will appear black. Anything green absorbed all colours except green. The green light is reflected to your eyes which makes it look green. Thus in red light (with no green in it) the red will be absorbed and no green light can be reflected to your eyes so the ball will look black.
Green light - Green, White light - Green, Red light - Black
White Light is made of all the colours of the spectrum (rainbow). If we look at something, say, green (like grass) it looks green to us because the chlorophyll in the leaves absorbs all the sunlight that lands on it with the exception of green light which it reflects. Therefore this green light that reflects into our eyes makes us see the grass as green. White objects, however, absorb no light and reflect all the colours back to us. As all the colours together make white light, we see the object (in your case, a T shirt) as white.
A white shirt will appear green under a green disco light because objects reflect the light projected onto them. Since the shirt is white, it will reflect the green light predominantly, giving it a green appearance.
The surface will look Red, because white reflects all colours and absorb none. If you hit a red light on, say, green then that would look black because green will absorb all the red but if it was a green light then it would look green. Every colour, except white, absorbs colours except itselves.
If an object is white in sunlight it will be green in green light. A white object reflects all wavelengths (colors) of light that shine on it. If only green light shines on it, that color will be reflected and the object will look green.
While the ball would still be green it will appear black. Anything green absorbed all colours except green. The green light is reflected to your eyes which makes it look green. Thus in red light (with no green in it) the red will be absorbed and no green light can be reflected to your eyes so the ball will look black.
Green light - Green, White light - Green, Red light - Black
White light is a mixture of many colors. If you see green when you look through a green glass, plastic, or whatever, it means that it lets the green light pass, other colors not.
You get light green.
A light green vicodin would look light green.
Magenta coloured light makes white light when mixed with green light
White Light is made of all the colours of the spectrum (rainbow). If we look at something, say, green (like grass) it looks green to us because the chlorophyll in the leaves absorbs all the sunlight that lands on it with the exception of green light which it reflects. Therefore this green light that reflects into our eyes makes us see the grass as green. White objects, however, absorb no light and reflect all the colours back to us. As all the colours together make white light, we see the object (in your case, a T shirt) as white.
Green and white
The object has absorbed light in the whole visible spectrum. For example, an object appearing blue in the white light has absorbed red, orange, yellow, green, indigo, and violet; but the blue light is reflected to your eyes. ==========================================
Light green.